Daniel mcfarlan moore



(No Model.) A

D, MOP. MOORE.

PHOSPHORBSOENT ELEGTRIGAL ILLUMINATION BY SECONDARY GURRENTS.

Patent ed Aug. 11, 1896.

HIHIIIIHE UNITED STATES PATENT OFFICE.

DANIEL MOFARLAN MOORE, OF NEW YORK, N. Y., ASSIGNOR TO THE MOORE ELECTRICAL COMPANY, OF SAME PLACE.

PHOSPHORESCENT ELECTRICAL ILLUMINATION BY SECONDARY CURRENTS.

SPECIFICATION forming part of Letters Patent No. 565,777, dated August 11, 1896. Application filed January 24, 1895. Renewed July 1, 1896. Serial No. 597,784. (No model.)

To 00% whom it may concern:

Be it known that I, DANIEL MOFAELAN MOORE, a citizen of the United States, and a resident of Ne W York, county and State of New York, have invented certain new and useful Improvements in Phosphorescent Electrical Illumination by Secondary Currents, (Case No. 15,) of which the following is a specification.

The object of my present invention, considered from the broadest points of view, is the interruption and closure of a secondary electric current in a vacuum; and it relates more particularly to the apparatus whereby this result may be accomplished; and its object again is to provide means whereby the current of the secondary may be of dangerous dimensions and yet protected, so that no one could be injured by it.

The general idea of my invention consists in generating a secondary electric current within an exhausted inclosu re and producing interruptions of the secondary also within the inclosure.

A modification consists in generating the secondary current outside of the inclosure and interrupting it at a point-inside.

By one form of my invention I inclose a Ruhmkorfi coil entirely within a vacuum and cause the vibrator not only to produce the intermittent current, but to produce the necessary interruptions for the production of a luininosity throughout the rarefied atmosphere.

The invention is illustrated in all its details in the accompanying drawings.

Figure 1 is a diagram illustrating the construction of the invention. Fig. 2 is a crosssection of that which is shown in Fig. 1 at the line X. Fig. 3 shows two modifications, both drawn upon the same main line-circuit, partly in section and partly in diagram. Fig. I shows another modification.

Referring to Fig. 1, A represents an evacuated tube having an extension A. In the tube is a bar of iron B, around which is located an insulating-tube C. Upon this is sprung a secondary coil whose circuit may be traced as follows: from one terminal E, through the coil D, through the short conductor F to the opposite terminal G. The two terminals are separable at the arrow E. The

terminal G has a long spring whose fulcrum is at H. The power to move this spring or lever is at the point of location of the armature I, which is within inductive relation to the magnet J, located outside of the tube and in circuit with an intermittentrcurrent producer K, which in turn is in circuit with the generator L. I

M and M are wires extending from the secondary coil through the extension, and their number may be multiplied without departing from the spirit of the'invention. The primary coil around the secondaryis lettered D. The primary current is generated by the dynamo L and is rapidly interrupted by the circuitinterrupter K, and therefore the magnet J is alternately magnetized and demagnetized. The magnet, being thus intermittently energized, causes the armature I to be drawn to and released from the magnet alternately, and for any distance moved through the terminals, at their points of contact, will move through as many times greater a distance as the distance from the armature I to the arrow E is greater than the distance from the said armature to the fulcrum H. For example, if the distance first named is three times as great as the latter-named distance,the separation will be three times the extent of the movement of the armature I, andtherefore the spark which takes place at the contacts may be definitely long and limited only by the electrical and mechanical dimensions of the elements involved in the construction. The sudden production of a current of definit-e length in the magnet J produces a secondary current in the secondary coil, which is instantaneously interrupted without at the same time interrupting the primary current, because the conducting-sections K are not infinitesimal, but are long enough to produce a current for a large fraction of a second or more and so that every time that the current is suddenly made the secondary is as suddenly interrupted, and the interruption causes an illumination throughout the evacuated space, and all the conductors located therein, as well as the iron, are surrounded by a halo of light. A modification of this construction would consist in assuming that the generator L is an alternator instead of a direct-current dynamo.

In Fig. 3 the same letters of reference indicate similar parts to those represented by the same letters in Fig. 1. The difference consists in that aRuhmkorff coil is entirely located within the tube A", and the terminals E and G become the vibrator operated by the magnetic action of the core B upon the armature I. A luminosity is produced throughout the evacuated space. In the tube A, having the extension A, there is a coil B, which is arranged in series with a secondary coil D around about a primary coil D, both located exterior to the glass tube A and having a movable core 13. The terminal G in this instance is vibrated by a magnet J, located, as before, in circuit with an interrupter K, both of which are in series circuit with the dynamo L, so that when the magnet is alternately energized and demagnetized the secondary current is intermittently interrupted within the evacuated space, producing a luminosity through the space and around the coil D.

Referring to Fig. 4, the tube is lettered A, the magnet J, the generator L, the armature I, the terminals, respectively, G and E, and the circuit-interrupter K. The primary coil D in this instance is wound upon the outside of the tube A and within inductive action of the secondary coilD, which is wound upon the iron core B within the evacuated space. It will be noticed that the current which is produced by the alternator L induces a current inthe secondary, and this current'be comes of higher electromotive force for producing long sparks at the terminals E and G when they are separated. A conductor 0 extends up the extension A from the secondary and becomes surrounded by an envelop of light throughout the entire length.

The convenient means for constructing the converter in Fig. 1 is illustrated in Fig. 2 in section. The secondary coil D of any number of convolutions is coileda little smaller in diameter than the glass tube 0, and it is then placed over the tube, which holds it in a stretched condition thereon, so as to bring it down close to the tube, which fits snugly upon the core B. Similarly the primary coil D is coiled a little larger than the internal diameter of the tube A, and, being'stre'tched lengthwise, may be placed within the tube and let go, when it willhold itself in a fixed position. In the drawings, Fig. 2,the space between the two coils is unnecessarily great. It should be as small as possible and just so that the coils D and D will not touch each other.

I claim as my invention- 1. The combination with an evacuated inclosure, of a conductor located therein and forming part of a secondary circuit with reference to a given primary circuit, and means for alternately interrupting and closing the secondary circuit within the vacuum.

2. The combination with an evacuated inclosure, of a conductor located therein and forming part of a secondary circuit with reference to a given primary circuit, means for alternately interrupting and closing the secondary circuit Within the vacuum, and an electric conductor ext-ending throughout the evacuated space and electrically connected to one of the said circuits.

3. The combination with an evacuatedinclosure, of an electric converter located therein, and means for interrupting the circuit of one of the coils within the vacuum.

4. The combination with an evacuated inclosure, of an electric converter located therein, means for interrupting the circuit of one of the coils within the vacuum, and an electric conductor extending throughout the evacuated space and connected to one of the coils.

5. The combination withan evacuated inclosure, of an electric converter located therein, means for interrupting the circuit of one of the coils within the vacuum, and an electric conductor extending throughout the evacuated space and connected to one of the coils, said converter consisting of an iron core, a translucent insulating-tube surrounding the core, a coil of wire stretched upon the tube, and another coil within inductive action of the other, held upon the inner surface of the evacuated inclosure.

6. The combination with an evacuated inclosure, of a conductor located therein, having separable terminals, and provided with an armature, a magnet outside of the inclosure and within inductive action of the armature, an intermittent circuit-interrupter in circuit with said magnet, and an electric converter, whose one coil is in circuit with the said separable terminals, and whose other coil is connected to a given electrical generator.

7. The combination with an evacuated inclosure, of a coil of an electric converter wound around the outside thereof, another coil of the converter Wound around the inside thereof parallel to the first coil and provided with separable contacts in an electric circuit, and means for separating the contacts within the vacuum.

8. The combination with an evacuated inclosure, of a coil of an electric converter wound around the outside thereof, another coil of the converter wound around the inside thereof parallel to the first coil and provided with separable contacts in an electric circuit, means for separating the contacts within the vacuum, and an electric conductor extending throughout the inclosure and electrically connected to that coil which is within the inclosure.

In testimony that I claim the foregoing as my invention I have signed my name, in presenee of two witnesses, this Sth'day of January, 1895.

, DANIEL MGFARLAN MOORE.

YVitnesses:

EDWARD P. THOMPSON, W. G. HAVENS. 

